Update output for test-merge5.
--- a/tests/test-merge5.out
+++ b/tests/test-merge5.out
@@ -9,4 +9,4 @@ removing b
this update spans a branch affecting the following files:
b
aborting update spanning branches!
-(use update -m to perform a branch merge)
+(use update -m to merge across branches or -C to lose changes)